Service "" was not found!

When I visit the local webservice page http://SERVER:7047/PROD/WS/
I get an error that service "" was not found.
I went to each individual web service and did not find any errors.
The error only is in our PROD instance, TEST (a copy of prod) works.
I cannot see a blank service name or any other obvious problem.

Do you have ideas how to find the issue?

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;
<s:Body>
<s:Fault>
<faultcode xmlns:a="urn:microsoft-dynamics-schemas/error">a:Microsoft.Dynamics.Nav.Service.WebMetadata.ServiceBrokerException</faultcode>
<faultstring xml:lang="en-US">Service "" was not found!</faultstring>
<detail>
<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Service "" was not found!</string>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>

Thanks.